Hanna Instruments HI 96811 User manual

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Instruction Manual
HI 96811
Refractometer for Wine and Grape
Product Measurements
www.hannainst.com

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All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the
copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.
Remove the instrument from the packing materials and examine carefully to ensure no
damage has occurred during shipping. If any damage has occurred, notify your Dealer
or closest Hanna Customer Service Center.
Each HI 96811 instrument is supplied with:
• 9 V battery
• Instruction manual
Note:Save all packing material until you are sure that the instrument functions
correctly. A defective instrument must be returned in its original packing.
Dear Customer,
Thank you for choosing a Hanna product. This manual will provide you with the necessary
information for the correct use of the instrument. Please read it carefully before using the meter. If
you need additional technical information, do not hesitate to e-mail us at [email protected].
This instrument is in compliance with directives.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION ............................................................................................. 2
GENERAL DESCRIPTION ..................................................................................................... 3
SPECIFICATIONS .................................................................................................................. 3
PRINCIPLE OF OPERATION ................................................................................................ 4
FUNCTIONAL DESCRIPTION................................................................................................ 5
DISPLAY ELEMENTS ............................................................................................................ 6
WARNINGS ........................................................................................................................... 6
ERROR MESSAGES .............................................................................................................. 7
CALIBRATION PROCEDURE ................................................................................................ 8
MEASUREMENT PROCEDURE ............................................................................................. 9
MAKING A STANDARD BRIX SOLUTION ..........................................................................10
TO CHANGE TEMPERATURE UNITS .................................................................................10
BATTERY REPLACEMENT .................................................................................................11
WARRANTY ........................................................................................................................11
MODEL IDENTIFICATION
HI 96811
GENERAL DESCRIPTION
The HI 96811 Digital Wine Refractometer is a rugged portable, water resistant device that benefits
from Hanna’s years of experience as a manufacturer of analytical instruments.
The HI 96811 is an optical instrument that employs the measurement of refractive index to display
the sugar content in grape samples from field samples or composite must samples at the winery. The
measurement of refractive index is simple and quick and provides the vintner a standard accepted
method for sugar content analysis. Samples are measured after a simple user calibration with
deionized or distilled water. Within seconds the instrument measures the refractive index of the grape
sample and converts it to % Brix concentration units. The HI 96811 digital refractometer eliminates
the uncertainity associated with mechanical refractometers and is easily portable for measurements
in the field.
The measurement technique and temperature compensation employ methodology recommended in
the ICUMSA Methods Book (Internationally recognized body for Sugar Analysis).
Temperature (in °C or °F) is displayed simultaneously with the measurement on the large dual level
display along with icons for Low Power other helpful message codes.
Key features include:
• Dual-level LCD
• Automatic Temperature Compensation (ATC)
• Easy setup and storage
• Battery operation with Low Power indicator (BEPS)
• Automatically turns off after 3 minutes of non-use.
• Automatic calibration
• °C and °F temperature scales
• Battery operated
• Reduce desktop clutter
SPECIFICATIONS
Range: 0 to 50 % Brix / 0 to 80°C (32 to 176°F)
Resolution: ± 0.1 % Brix / ±0.1°C (±0.1°F)
Accuracy: ± 0.2 % Brix / ± 0.3°C (±0.5°F)
Temperature Compensation: Automatic between 10 and 40°C (50 - 104°F)
Measurement Time: Approximately 1.5 seconds
Minimum Sample Volume: 100μL (cover prism totally)
Light Source: Yellow LED
Sample Cell: SS ring and flint glass prism
Case Material: ABS
Enclosure Rating: IP 65
Battery Type / Life: 1 X 9V / 5000 readings
Auto-Off: After 3 minutes of non-use
Dimensions: 19.2(W) x 10.2(D) x 6.7 (H)cm
Mass: 420g

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The Brix determination is made by measuring the refractive index of a solution. Refractive Index is
an optical characteristic of a substance and the number of dissolved particles in it. Refractive Index
is defined as the ratio of the speed of light in empty space to the speed of light in the substance. A
result of this property is that light will “bend”, or change direction, when it travels through a
substance of different refractive index. This is called refraction.
When passing from a material with a higher to lower refractive index, there is a critical angle at
which an incoming beam of light can no longer refract, but will instead be reflected off the interface.
The critical angle can be used to easily calculate the refractive index according to the equation:
sin (θcritical) = n2/ n1
Where n2is the refractive index of the lower-density medium; n1is the refractive index of the higher-
density medium.
In the HI 96811, light from an LED passes through a prism in contact with the sample. An image
sensor determines the critical angle at which the light is no longer refracted through the sample.
The HI 96811 automatically applies temperature compensation to the measurement and converts
the refractive index of the sample to sucrose concentration in units of percent (by weight) Brix.
8. Battery Cover
9. Battery Compartment
1. Liquid Crystal Display (LCD)
2. Read Key (User Measurement)
3. Zero Key (User Calibration)
4. On/Off
5. Primary Display
6. Secondary Display
7. Stainless Steel Sample Well and Prism
TOP VIEW
BOTTOM
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONPRINCIPLE OF OPERATION

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DISPLAY ELEMENTSDISPLAY ELEMENTS
DISPLAY ELEMENTSDISPLAY ELEMENTS
DISPLAY ELEMENTS ERROR MESSAGESERROR MESSAGES
ERROR MESSAGESERROR MESSAGES
ERROR MESSAGES
1. SETUP: Factory Calibration Tag
2. Measurement in Progress Tag
3. Battery (blinks when low battery condition detected)
4. Calibration Tag
5. Automatic Temperature Compensation
(blinks when temperature exceeds 10-40°C / 50-104°F range)
6 Primary Display (displays measurement and error messages)
7. Temperature Units
8. Secondary Display (displays temperature measurements; when blinking,
temperature has exceeded operation range: 0-80°C / 32-176°F)
•Handle instrument carefully. Do not drop.
•Do not immerse instrument under water.
•Do not spray water to any part of instrument except the “sample well” located over the prism.
•The instrument is intended to measure grape/wine solutions. Do not expose instrument or
prism to solvents that will damage it. This includes most organic solvents and extremely hot
or cold solutions.
•Particulate matter in a sample may scratch the prism. Absorb sample on soft tissue and rinse
sample well with deionized or distilled water between samples.
•Use plastic pipettes to transfer all solutions. Do not use metallic tools such as needles, spoons
or tweezers as these will scratch the prism.
MEASUREMENT GUIDELINESMEASUREMENT GUIDELINES
MEASUREMENT GUIDELINESMEASUREMENT GUIDELINES
MEASUREMENT GUIDELINES
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MEASUREMENTMEASUREMENT
MEASUREMENTMEASUREMENT
MEASUREMENT
Verify the instrument has been calibrated before taking measurements.
1. Wipe off prism surface located at the bottom of the sample well.
2. Using plastic pipettes, drip sample onto the prism surface. Fill the well completely.
Note: If the temperature of the sample differs significantly from the temperature of the
instrument, wait approximately 1 minute to allow thermal equilibration.
3. Press the READ key. Measurement is displayed in units of % BRIX.
Note: The last measurement value will be displayed until the next sample is measured or the
instrument is turned off. Temperature will be continuously updated.
Note: The ATC tag blinks and automatic temperature compensation is disabled if the tempera-
ture exceeds the 10-40°C / 50-104°F range.
4. Remove sample from the sample well by absorbing on a soft tissue.
5. Using plastic pipettes, rinse prism and sample well with distilled or deionized water. Wipe
dry. The instrument is ready for the next sample.
Calibration should be performed daily, before measurements are made, when the battery has
been replaced, or between a long series of measurements.
1. Press the ON/OFF key, then release. Two instrument test screens will be displayed briefly;
a LCD segment followed by the percentage of remaining battery life. When LCD displays dashes,
the instrument is ready.
2. Using plastic pipettes, fill the sample well with distilled or deionized water.
Note: If the ZERO sample is subject to intense light such as sunlight or another strong source,
cover the sample well with your hand or other shade during the calibration.
3. Press the ZERO key. If no error messages appear, your unit is calibrated.
(For a description of ERROR MESSAGES see page 7).
Note: The 0.0 screen will remain until a sample is measured or the power is turned off.
4. Gently absorb the ZERO water standard with a soft tissue. Use care not to scratch the prism
surface. Wipe off the surface completely. The instrument is ready for sample measurement.
Note: If instrument is turned off the calibration will not be lost.
CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
CALIBRATION

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MAKING A STANDARD % BRIX SOLUTIONMAKING A STANDARD % BRIX SOLUTION
MAKING A STANDARD % BRIX SOLUTIONMAKING A STANDARD % BRIX SOLUTION
MAKING A STANDARD % BRIX SOLUTION
To make a Brix Solution, follow the procedure below:
•Place container (such as a glass vial or dropper bottle that has a cover) on an analytical balance.
•Tare the balance.
•To make an X BRIX solution weigh out X grams of high purity Sucrose (CAS #: 57-50-1)
directly into the container.
•Add distilled or deionized water to the container so the total weight of the solution is 100g.
•Note: Solutions above 60 % Brix need to be vigorously stirred or shaken and heated in a
water bath. Remove solution from bath when sucrose has dissolved. The total quantity can be
scaled proportionally for smaller containers but accuracy may be sacrificed.
Example with 25% Brix:
%Brix%Brix
%Brix%Brix
%Brix g Sucroseg Sucrose
g Sucroseg Sucrose
g Sucrose g Waterg Water
g Waterg Water
g Water g Tg T
g Tg T
g Totalotal
otalotal
otal
25 25.000 75.000 100.000
TO CHANGE TEMPERATURE UNITSTO CHANGE TEMPERATURE UNITS
TO CHANGE TEMPERATURE UNITSTO CHANGE TEMPERATURE UNITS
TO CHANGE TEMPERATURE UNITS
To change the temperature measurement unit from Celsius to Fahrenheit (or vice versa), follow this
procedure.
1. Press and hold the ON/OFF key continuously for aproximately 15 seconds. The LCD will
display the “all segment” screen followed by a screen with the model number on the primary
display and the version number on the secondary display. Continue pressing the ON/OFF key.
2. While continuing to hold the ON/OFF key, press the ZERO key. The temperature unit will
change from °C to °F or vice versa.
15 seconds
To replace the instrument’s battery, follow these steps:
•Turn the instrument OFF by pressing the ON/OFF key.
•Turn instrument upside down and remove the battery cover by turning it counterclockwise.
•Extract the battery from its location.
•Replace with fresh 9V battery making certain to observe polarity.
•Insert the back battery cover and fasten it by turning clockwise to engage.
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI 96811 is warranted for two years against defects in workmanship and materials when used
for its intended purpose and maintained according to the instructions.
This warranty is limited to repair or replacement free of charge.
Damage due to accident, misuse, tampering or lack of prescribed maintenance is not covered.
If service is required, contact your dealer. If under warranty, report the model number, date of
purchase, serial number and the nature of the failure. If the repair is not covered by the warranty,
you will be notified of the charges incurred.
If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods
Authorization Number from the Customer Service Department and then send it with shipment
costs prepaid. When shipping any instrument, make sure it is properly packaged for complete
protection.
To validate your warranty, fill out and return the enclosed warranty card within 14 days from the
date of purchase.
°C or °F

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SALES AND TECHNICAL SERVICE CONTACTSSALES AND TECHNICAL SERVICE CONTACTS
SALES AND TECHNICAL SERVICE CONTACTSSALES AND TECHNICAL SERVICE CONTACTS
SALES AND TECHNICAL SERVICE CONTACTS
Australia:
Tel. [phone] • Fax [phone]
China:
Tel. [phone] • Fax [phone]
Egypt:
Tel. & Fax [phone]
Germany:
Tel. [phone] • Fax [phone]
Greece:
Tel. [phone] • Fax [phone]
Indonesia:
Tel. [phone] • Fax [phone]
Japan:
Tel. [phone] • Fax [phone]
Korea:
Tel. [phone] • Fax [phone]
Malaysia:
Tel. [phone] • Fax [phone]
Singapore:
Tel. [phone] • Fax [phone]
South Africa:
Tel. [phone] • Fax [phone]
Taiwan:
Tel. [phone] • Fax [phone]
Thailand:
Tel. [phone] • Fax [phone]
United Kingdom:
Tel. [phone] • Fax [phone]
USA:
Tel. [phone] • Fax [phone]
For e-mail contacts and a complete list of Sales and Technical offices, please see
www.hannainst.com
.
MAN96811
08/08